Didn't know the stomach acid is the variant of hydrochloric acid. It's a very strong stuff, and I have chronic agita / excess stomach acid. Koichi Yasutani - a.k.a. Steve + MP Lakewood, WA U.S.A. 2010 / 11 / 20 18：30 PST On Nov 18, 2010, at 1925 , Eric Welch wrote: > I learned plenty in my year as a chemistry major in college to know that just > because something acts one way in a specific environment in contact with > specific elements does not mean it will act that way in another environment. > > For example, glass is perfectly fine to hold most acids, but not hydrofluoric > acid. it will eat right through glass. So they have to use some other kind of > container for that. Used to be they'd use wax. Not sure what they would use > now. > > And hydrochloric acid is in your stomach digesting your food, but if it > becomes too concentrated, it eats holes in that very same stomach. > > Vinegar is acid as well, but too concentrated and you wouldn't be putting it > in your mouth.